Hello. The IT dept at my company recently had to format the hard drive of my laptop to clean out many problems. I now have no volume icon in the taskbar. When I went in through Control Panel /Display, I received this message:
"Windows cannot display the volume control on the taskbar because the Volume Control program has not been installed. To install it use Add/Remove Programs in Control Panel."
Have you installed all the necessary drivers for your model laptop and OS given from laptop mfg. website ? Once Audio drivers are installed you can open Control Panel, Sound, set the sound card that is installed in laptop and checkmark to show volume control in tray.